Send to second server if account doesn't exist

[snyperx3]

We have an Exchange 2010 server for half of the users, and an external Google apps account for the other half. Both sets use the same domain name.

The MX records are configured so that messages sent from outside the network are delivered to Google first, and if the account does not exist there, then pass it on to our Exchange server. This is working fine.

We are also able to send directly from one of our accounts on Google to an account on Exchange.

We cannot send from an account on Exchange to an account on Google. It gives an error that the account does not exist. Is there a way to configure Exchange so that if we send a message to our domain and the account doesn't exist on the Exchange server, to send it to the google server?

Thanks,
Pete

 

[58sniper]

You could configure a Smart Host, but the problem there is if an email is sent to your domain for an address that doesn't exist anywhere. You'll end up in a mail loop. And that's VERY bad.

Stop by the new Tek-Tips group at LinkedIn. Come say hi, look for a job, have some fun.

http://www.linkedin.com/groups/Networking-TekTipscom-forums-members-3952395

Pat Richard MVP

http://www.exchangeblogs.com/

 

[snyperx3]

We have a hardware spam filter between Google and Exchange that does LDAP lookups. I think that would prevent the mail loop. Thanks for your suggestion!

-Pete